Sổ tay module truyền thông CP 243-2 AS-Interface Master

Sổ tay module truyền thông CP 243-2 AS-Interface Master

Technical Description and

AS-Interface Protocol

Structure of the PROFIBUS Parameter Assignment and

! Danger indicates that death, severe personal injury or substantial property damage will result if

proper precautions are not taken

!

Warning

indicates that death, severe personal injury or substantial property damage can, result if

proper precautions are not taken

draws your attention to particularly important information on the product, handling the

product, or to a particular part of the documentation

Qualified Personnel

Only qualified personnel should be allowed to install and work on this equipment Qualified persons are defined

as persons who are authorized to commission, to ground, and to tag circuits, equipment, and systems in dance with established safety practices and standards.

accor-Correct Usage

Note the following:

! WarningThis device and its components may only be used for the applications described in the

catalog or the technical description, and only in connection with devices or componentsfrom other manufacturers which have been approved or recommended by Siemens

This product can only function correctly and safely if it is transported, stored, set up, andinstalled correctly, and operated and maintained as recommended

Trademarks

SIMATIC R and SIMATIC NET R are registered trademarks of SIEMENS AG.

Third parties using for their own purposes any other names in this document which refer to trademarks might fringe upon the rights of the trademark owners.

in-We have checked the contents of this manual for agreement with the ware and software described Since deviations cannot be precluded entirely,

hard-we cannot guarantee full agreement Hohard-wever, the data in this manual are reviewed regularly and any necessary corrections included in subsequent editions Suggestions for improvement are welcomed.

Disclaimer of Liability Copyright Siemens AG 1997 All rights reserved

The reproduction, transmission or use of this document or its contents is not

permitted without express written authority Offenders will be liable for

damages All rights, including rights created by patent grant or registration of

a utility model or design, are reserved.

Siemens AG

Automation Group

Industrial Automation Systems

Subject to change.

Purpose of the Manual

This manual supports you when using the CP 242-8 module It explains how an

S7-200 CPU can address AS-i actuators and AS-i sensors via this module Themanual also explains how to access an S7-200 station as a PROFIBUS DP slavevia the CP 242-8

We recommend the following procedure when

you want an overall picture of the AS-Interface:

– First read the ‘AS-Interface Introduction and Basic Information’ manual (part

of this documentation package) This contains general information about the

AS-Interface abbreviated to AS-i in the following chapters.

You want to set up an AS-i system and include the CP 242-8 module in it:– You will find the information you require about connecting and operating the

To understand this manual, you require the following:

A working knowledge of PROFIBUS DPYou should be familiar with the ‘AS-Interface Introduction and Basic Information’manual (supplied with this documentation package)

Diskette with Sample Program and Type/GSD File

The diskette accompanying this manual (S7-200 PROGR) contains sample

programs that will support and help you when programming the CP 242-8 Thesesample programs were written with STEP 7 Micro/WIN and can be run on anS7-200 CPU

The diskette also contains the type and DDB file you require for configuring the CP242-8 with your DP master.(See Section 4.4, Configuring the CP 242-8 on the DPMaster / Content of the Type File and the DDB file.)

iv AS-Interface Master / PROFIBUS DP Slave – Release 01CP 242-8

The address of the AUT homepage in the World Wide Web of the Internet is asfollows:

http://www.ad.siemens.de/net

Further Support – Hotline

S Our hotline is also available to deal with problems:

-1 Technical Description and Installation Instructions 1-1

1.1 General 1-21.2 Application of the Module 1-41.3 Technical Specifications of the Module 1-61.4 Installing the Module 1-71.5 Front Panel – Access to all Functions 1-81.6 Connection Elements 1-91.7 Display and Control Elements 1-111.7.1 Status Display 1-121.7.2 Slave Display for AS-i Slaves 1-141.7.3 Displaying and Setting the PROFIBUS Address 1-161.8 Configuring the AS-Interface with the SET Button 1-18

2 Interface to the User Program in the S7-200 CPU 2-1

2.1 CP 242-8 Connects the S7-200 CPU with PROFIBUS DP

and AS-Interface 2-22.2 Addressing the CP 242-8 in the S7-200 CPU 2-42.3 Meaning of the Data in the Digital Module 2-72.3.1 Identification Register in the Digital Module 2-82.3.2 Error Register in the Digital Module 2-92.3.3 Status Byte (Input Register 8DI) 2-112.3.4 Control Byte (Output Register 8DO) 2-132.4 Meaning of the Data in the Analog Module 2-142.4.1 Identification Register in the Analog Module 2-152.4.2 Error Register in the Analog Module 2-162.5 Access to the Analog Input and Output Words 2-172.5.1 Analog Input Area 2-182.5.2 Analog Output Area 2-20

3 CP 242-8 as AS-Interface Master 3-1

3.1 About this Chapter 3-23.2 Addressing the AS-i Slaves with the User Program 3-33.3 Access to the AS-i User Data 3-63.4 Signaling Errors and Diagnostic Information 3-73.5 Command interface of the CP 242-8 3-93.6 Description of the AS-i Commands 3-13

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3.6.6 Set_Permanent_Configuration 3-233.6.7 Get_Permanent_Configuration 3-243.6.8 Store_Actual_Configuration 3-253.6.9 Read_Actual_Configuration 3-263.6.10 Set_LPS 3-273.6.11 Set_Offline_Mode 3-283.6.12 Select Autoprogramming 3-293.6.13 Set_Operation_Mode 3-303.6.14 Change_Slave_Address 3-313.6.15 Read Slave Status 3-323.6.16 Read Lists and Flags

(Get_LPS, Get_LAS, Get_LDS, Get_Flags) 3-333.6.17 Read Total Configuration 3-353.6.18 Configure Total System 3-373.6.19 Write Parameter List 3-403.6.20 Read Parameter Echo List 3-413.6.21 Read Version ID 3-423.6.22 Read and Delete Slave Status 3-433.6.23 Read Slave ID 3-443.6.24 Read Slave I/O 3-453.6.25 Read Data and Delta List 3-46

4 The CP 242-8 as PROFIBUS DP Slave 4-1

4.1 Transferring User Data Between the DP Master and CP 242-8 4-24.2 Controlling Access with the DP Data Area 4-44.2.1 Byte-Consistent Data Transfer 4-54.2.2 Block-Consistent Data Transfer 4-74.3 DP Status Information 4-114.4 Configuring the CP 242-8 in the DP Master/Content of the Type File and the

DDB File 4-134.5 Transmission Rate on PROFIBUS 4-164.6 PROFIBUS DP Control Commands 4-174.7 DP Slave Diagnostics 4-184.7.1 Station Status 1 to 3 4-194.7.2 PROFIBUS Address of the DP Master and Vendor ID 4-214.7.3 Structure of the Device-RelatedDiagnostic Information 4-21

5 Dealing with Problems / Error Displays 5-1

5.1 Replacing a Defective AS-i Slave/Automatic Address Programming 5-25.2 Error Indicators on the CP 242-8/ Dealing with Errors 5-3

B Structure of the PROFIBUS DP Parameter Assignment and

1.1 General 1-21.2 Application of the Module 1-41.3 Technical Specifications of the Module 1-61.4 Installing the Module 1-71.5 Front Panel – Access to all Functions 1-81.6 Connection Elements 1-91.7 Display and Control Elements 1-111.7.1 Status Display 1-121.7.2 Slave Display for AS-i Slaves 1-141.7.3 Displaying and Setting the PROFIBUS Address 1-161.8 Configuring the AS-Interface with the SET Button 1-18

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This chapter explains the performance, installation and basic functions of themaster module CP 242-8

You will learn the following:

Which PLC systems can be operated with the CP 242-8 on PROFIBUS DP andAS-Interface

Which modes are supported by the CP 242-8How to install the CP 242-8

The display and control elements of the CP 242-8How to configure the CP 242-8 by pushbuttonHow to set the PROFIBUS address on the CP 242-8

! CautionWhen handling and installing the CP 242-8 module, make sure that you adhere to

the ESD guidelines

The CP 242-8 must only be connected when the AS-i power supply unit is turnedoff

! CautionNoise immunity/grounding

To ensure the noise immunity of the CP 242-8, both the CP 242-8 and the AS-ipower supply unit must be grounded correctly

! CautionThe AS-i power supply unit used must provide a low voltage, safely isolated from

the network This safe isolation can be implemented according to the followingrequirements:

VDE 0100 Part 410 = HD 38444 = IEC 364441(as functional extra-low voltage with safe isolation) orVDE 0805 = EN60950 = IEC 950

(as safety extra-low voltage SELV) orVDE 0106 Part 101

! CautionThe external 24 V power supply must be safely isolated.

Note

The CP 242-8 can be configured, installed and started up separate from thePROFIBUS installation

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DP Slave and AS-Interface Master

The CP 242-8 module can be operated in the S7*200 programmable logic

controller It allows the simultaneous attachment of an S7*200 to PROFIBUS DP(as a DP slave) and to the AS-Interface (as AS-Interface master) Both networkattachments can be used independently of each other

AS*i adapter

AS*i power supply unit

Active module(with slave ASIC)

Passive module(without slave ASIC)

AS-icable

Actuator/sensorwith slave ASIC

S7*200 CPU

Q0.0 Q0.2 Q0.4

SIMATIC S7*200

SIEMENS

CP 242-8

Wider networking via PROFIBUS DP

SF APF

CM

AS-Interface Master

CP 242 * 2

6GK7 242 * 2AX00 * 0XA0 1

4

5 7 0 9

10 12 14

15 17 19

20 22 24

25 28

30

X 2

DP slave / AS-i master

Figure 1-1 Example of a System Setup with the CP 242-8

System Integration and Structure

Refer to the accompanying product information bulletin to find out the CPUs withwhich the CP 242-8 can be operated

From the point of view of the S7*200 CPU, the CP 242-8 is considered as twoexpansion modules (one 8DI/8DO digital module and one 8AI/8AO analog

module)

In terms of installation, the CP 242-8 has the same technology as a standardexpansion module for an S7*200 station

Power Supply

The CP 242-8 requires an external 24 V power supply for operation

Components of the Product

The product CP 242-8 includes the following components:

CP 242-8Bus connectorProduct Information for the CP 242-8

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The CP 242-8 module has the following technical specifications:

Table 1-1

AS-i cycle time 5 ms with 31 slaves

Configuration of the AS-Interface By a button on the front panel

Supported AS-i master profiles M1

Connection of the AS-i cable Via a 7-pin terminal block

Permitted current loading from pin 1 to pin 3 or pin

2 to pin 4, maximum 3 A Connection to PROFIBUS Via 9-pin sub D female connector

PROFIBUS address setting – Address range 1 to 126

– Set with SET and DISPLAY buttons Permitted loading 5V DC at PROFIBUS connector max 90 mA

Data rates supported (transmission rate) on

PROFIBUS

9.6 Kbps; 19.2 Kbps; 45.45 Kbps; 93.75 Kbps; 187.5 Kbps; 500 Kbps; 1.5 Mbps; 3 Mbps;

6 Mbps; 12 Mbps Connection to an external 24 V power supply Via terminal block (7-pin)

Address range One digital module with 8DI/8DO and one analog

module with 8AI/8AO Power supply from SIMATIC backplane bus

Current consumption from 5V DC

5 V DC

ma × 340 mA External power supply

Current consumption from 24 V

24 V DC (permitted range 20.4 to 28.8V DC)

ma × 60 mA Power supply from the AS-i cable

Current consumption from the AS-i cable

According to the AS-I specification

ma × 100 mA Power consumption 3.7 W

Ambient conditions

Operating temperature Horizontal installation: 0 to 55 ° C

Vertical installation: 0 to 45 ° C Transportation and storage temperature – 40 ° C to +70 ° C

Relative humidity max 95% at +25 ° C

1.4 Installing the Module

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Connection, Display and Control Elements

On the front panel, you have access to all the connection, display and controlelements of the CP 242-8

During operation, connection and control elements are protected by a front cover

SF APF CER AUP CM

CP 242-8

AS-Interface Master PROFIBUS DP Slave

1 2 3 4

5 6 7 8

0

9

10 11 12 13 14

15 16 17 18 19

20 21 22 23 24

25 26 27 28 29

– For AS-i configuration

– For setting the

wall installation

+ 24 V –

6GK7 242-8DP00-0XA0

Figure 1-2 Front Panel

Connections, Operator Controls and Interpreting the Displays

For more detailed information, refer to the following sections

1.6 Connection Elements

Connections

The CP 242-8 has the following connectors:

Two connectors to the AS-i cable (bridged internally)One connector for the external 24 V supply

One connection for functional earthOne connector to PROFIBUS (9-pin sub D female connector)The connectors are located below the upper cover of the front panel of the CP242-8

Figure 1-3 Connection of the AS-i Cable

Connections to the AS-i cable

The CP 242-8 has two connectors for AS-i cables that are bridged internally in the

CP 242-8

This allows the CP 242-8 to be looped into the AS-i cable

! CautionThe permitted current loading of the AS-i connection contacts is 3 A If this value

is exceeded on the AS-i cable, the CP 242-8 must not be looped into the AS-icable but must be connected with a tap line (only one pair of connectors of the CP242-8 is used)

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External Power Supply

The CP 242-8 requires an external 24 V power supply (the permitted voltage range

is 20.4 to 28.8V DC) The current required from the 24 V supply is 60 mA

With the AC and relay variants of the S7-200 CPUs, the sensor/transmitter supplyprovided by the CPU can be used (see /4/)

Connection to PROFIBUS DP is via a 9-pin sub D female connector

! WarningWhen laying and installing the PROFIBUS DP cable and the bus connector, follow

the instructions in /5/

To attach to PROFIBUS DP, it is advisable to use bus connector 6ES7

972-0BA40-0XA0

1.7 Display and Control Elements

Meaning of the ADR, BF and DIA LEDs

The front panel of the CP 242-8 has a row with 8 LEDs (see Figure 1-2) All theLEDs are 2-color (red/green or yellow/green) The upper three LEDs (ADR, BF andDIA) make up the group display They indicate the display status

Changing the Display Status – DISPLAY Button

The following figure shows the possible display statuses of the group display.You can change between the status display, slave display and PROFIBUS address

display with the DISPLAY button Each time you press the button, you change to

the next display status finally returning to the initial status

ÍÍ

ÍÍ

ÈÈ ÈÈ

red red/yellow or off green green or off off

Change to the next display status with the DISPLAY button

Status display

(initial status)

Display of the AS-i slaves

Key:

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Interpreting the Status Display

The status display is easily recognized because no groupLED is lit green The ”ADR” LED must also not be lit red.The status display is the default standard display in theinitial state of the CP 242-8

The lower 7 LEDs indicate the status of the CP 242-8;the label to the right of the LEDs then applies

The bottom 5 LEDs indicate errors/states on theAS-Interface The BF and DIA LEDs indicate errors ordiagnostic messages on PROFIBUS DP

Meaning of the 7 Lower LEDs

When the status display is active, the LEDs have the following significance:

Table 1-2

BF (red) Bus Failure Indicates errors on PROFIBUS DP.

The LED is lit when:

The connection between the DP master and the CP 242-8 has broken down or the DP master is not active.

The CP 242-8 was not or was incorrectly configured/assigned parameters by the DP master.

DIA (yellow) Diagnostics The LED is lit when the CP 242-8 indicates diagnostic information to

the DP master.

Diagnostic information is reported by the CP 242-8 when the bit PLC_RUN=0 (see Section 2.3.4 ); this is always the situation when the S7-200 CPU is in the STOP mode.

SF (red) System error The LED is lit when:

The CP 242-8 has detected an internal error (for example EEPROM defective).

The CP 242-8 cannot currently make the mode change requested with the SET button (for example an AS-i slave with address 0 exists).

APF (red) AS-i Power Fail This indicates that the voltage supplied to the AS-i cable by the AS-i

power supply unit is too low or there is a complete power outage.

yellow or off

Table 1-2 , (continued)

CER (yellow) Configuration

Error

This LED indicates whether the slave configuration detected on the AS-i cable matches the expected configuration on the CP 242-8 If they do not match, the CER LED is lit.

The CER LED is lit in the following situations:

When a configured AS-i slave does not exist on the AS-i cable (for example failure of the slave).

When an AS-i slave exists on the AS-i cable but it was not previously configured.

When an attached AS-i slave has different configuration data (I/O configuration, ID code) from the slave configured on the CP 242-8 When the CP 242-8 is in the offline phase.

AUP (green) Autoprog

available

In the protected mode of the CP 242-8, this indicates that automatic address programming of an AS-i slave is possible The automatic address programming makes it much easier to exchange a defective AS-i slave on the AS-i cable (for more detailed information refer to Chapter 5.1).

CM (yellow) Configuration

Mode

This LED displays the mode of the CP 242-8.

LED lit: Configuration Mode LED unlit: Protected Mode The configuration mode is only required for installing and starting up the CP 242-8 In the configuration mode, the CP 242-8 activates all connected AS-i slaves and exchanges data with them For more information about the configuration mode, refer to Section 1.8.

Note

If there are no errors detected in the protected mode of the CP 242-8, all LEDs

are off

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Interpreting the slave display status

The slave display can be recognized by the fact that at leastone group LED is lit green and that the ADR LED is not red.The lower 5 LEDs then indicate the slaves on the

AS-Interface In this case, the label to the left of the LEDsapplies The display always represents 5 slaves

Display Statuses and Operation in Detail

The AS-i slaves are displayed in groups of five The upper three group LEDsindicate (in green) which of the groups of 5 is displayed The lower five LEDs are litgreen to indicate the detected or active AS-i slaves within the group

You can move from group to group by pressing the DISPLAY button again.The module returns to the status display in the following situations:

– After displaying the last group (AS-i slaves 30, 31) and pressing theDISPLAY button twice (In other words changing to the PROFIBUS addressdisplay and then to the status display.)

– If you do not press the DISPLAY button for approximately 8 minutes

Characteristics of the Slave Display

If the CP 242-8 is in the configuration mode, all detected AS-i slaves are

displayed

If the CP 242-8 is in the protected mode, all active AS-i slaves are displayed.

In the protected mode, failed or existing but unconfigured AS-i slaves areindicated by the corresponding LED flashing

Example of a Slave Display

SF APF CER AUP CM 1

2 3 4

5 6 7 8

0

9

10 11 12 13 14

15 16 17 18 19

20 21 22 23 24

25 26 27 28 29

30

3 4

BF DIA

Figure 1-4 Example of a Slave Display

From the display you can obtain the following information:

The group LEDs indicate the second group of five

Within this group, the active AS-i slaves 6 and 8 are displayed by the lower fiveLEDs

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Interpreting the PROFIBUS Address Display

If the top LED (”ADR”) of the group display is lit up red, the 7lower LEDs indicate the PROFIBUS address of the CP

242-8 in binary format.

Setting the PROFIBUS Address

To set the PROFIBUS address of the CP 242-8, follow the steps outlined below:

1 Switch the S7-200 CPU to STOP This ensures that bit PLC_RUN = 0

4 If you press the SET button, this bit is set (LED on), if you press the DISPLAYbutton, the bit is reset (LED off) The display then jumps to the ”DIA” LED (nextaddress bit of the PROFIBUS address)

5 By following the steps outlined above, you can now set or reset each of theindividual bits of the PROFIBUS address

6 Once you have entered all the bits, the display of the set address bits flasheschanging quickly between red/green or yellow/green If you press the SETbutton again, the set PROFIBUS address is adopted by the CP 242-8 If, on theother hand, you press the DISPLAY button, the new address is discarded Theentry of the new address must then be repeated (as in steps 4 and 5)

The value of the address bits represented by the LEDs of the PROFIBUS address

is illustrated in the following example:

SF APF CER AUP CM

BF DIA ADR

Labeling field

status display

LED row Value of the address bit

red green

green

green

6432168421

In the example, the LEDs indicate the PROFIBUS address:

64 + 4 + 1 = 69

Figure 1-5

In the example above, the PROFIBUS address 69 was set with the SET/DISPLAYbuttons

The highest address that can be set is address 126 Remember that address 126

is reserved on PROFIBUS for special functions (address assignment) For dataexchange with a DP master, you can use addresses 1 to 125

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Interpreting the Display Status

The CP 242-8 can adopt two modes on the AS-Interface:

Configuration ModeProtected ModeWhen you press the SET button, the mode is changed

Note

The SET button is only effective when the bit PLC_RUN = 0 is set in the controlbyte of the CP 242-8 This is always the case, when the S7*200 CPU is in theSTOP mode

Configuration Mode

The configuration mode is used during AS-i installation and startup

In the configuration mode, the CP 242-8 can exchange data with every AS-i slaveconnected to the AS-i cable (except for the AS-i slave with address ‘0’) Any AS-islaves that are added later are detected immediately by the master and activatedand included in the cyclic data exchange

When installation and startup is completed, the CP 242-8 can be switched to theprotected mode using the SET button Any AS-i slaves active at this point aretherefore configured The following data are stored on the CP 242-8 in non-volatilememory:

The addresses of the AS-i slavesthe ID codes

the I/O configurationThe current slave parameters

Preparing to Configure

Make sure that the following situation applies:

The S7-200 CPU must be set to STOP (PLC_RUN=0)

The CP 242-8 and all AS-i slaves must be connected to the AS interface andsupplied with power by the AS-i power supply unit

Note

It is only possible to configure the AS interface with the status display and slavedisplay status The CP 242-8 must not be in the PROFIBUS address displaymode, in other words when the SET button is pressed, the ”ADR” LED displaymust not be lit red

4 Press the SET button This configures the CP 242-8

At the same time, the CP 242-8 is switched to the protected mode, the ”CM”LED goes off

The ”CER” LED also goes off since the ”expected configuration” stored on the

CP 242-8 after configuration matches the existing ”actual configuration” on theAS-Interface

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Note

Changing from the configuration mode to the protected mode is only possiblewhen there is no AS-i slave with address 0 connected to the AS-Interface If aslave 0 is connected, the ”SF” LED is lit when the SET button is pressed

2.1 CP 242-8 Connects the S7-200 CPU to PROFIBUS DP

and AS-Interface 2-22.2 Addressing the CP 242-8 in the S7-200 CPU 2-42.3 Meaning of the Data in the Digital Module 2-72.3.1 Identification Register in the Digital Module 2-82.3.2 Error Register in the Digital Module 2-92.3.3 Status Byte (Input Register 8DI) 2-112.3.4 Control Byte (Output Register 8DO) 2-132.4 Meaning of the Data in the Analog Module 2-142.4.1 Identification Register in the Analog Module 2-152.4.2 Error Register in the Analog Module 2-162.5 Access to the Analog Input and Output Words 2-172.5.1 Analog Input Area 2-182.5.2 Analog Output Area 2-20

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AS-Interface

CP 242-8 as Expansion Module in the S7-200

The CP 242-8 occupies 2 consecutive expansion module slots in the S7-200:Digital module 8DI/8DO

Analog module 8AI/8AO

CP 242-8 PROFIBUS DP

SF APF

CM

AS-Interface Master

CP 242-2

6GK7 242-2AX00-0XA0 1

4

5 8

0 9

10 12 15 18

20 22 25 27 30

User program Digital module (8DI/8DO)

Analog module (8AI/8AO)

DP input/output data Status and diagnostic messages (DP) Input/output data of the AS-i slaves AS-i diagnostic information (delta list) AS-i commands and response data

Status/error information

DP coordination Bank selection

The data to be addressed in the analog module by the user program is selectedusing bank select bits

Analog Module

The analog module occupies 16 input and 16 output bytes in the address area ofthe analog inputs and outputs The data exchange both with the PROFIBUS DPmaster and the AS-i slaves is handled via the analog module (see Figure 2-1).The bank select mechanism means that a larger data area in total can be

addressed in the analog module than the addressable data area in the S7-200CPU for the expansion module

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Address Areas

The start addresses of the address areas are determined by the following:

The type of S7-200 CPU being usedThe slot of the CP 242-8 in the S7-200

Examples

The following table contains examples of the addresses of the digital and analoginput/output areas with the possible configurations with a CPU 212 and CPU 214.Example of a CPU 212 and a CP 242-8

I0.0 Q0.0 I1.0 Q1.0 AIW0 AQW0 I0.1 Q0.1 I1.1 Q1.1 AIW2 AQW2 I0.2 Q0.2 I1.2 Q1.2 AIW4 AQW4 I0.3 Q0.3 I1.3 Q1.3 AIW6 AQW6 I0.4 Q0.4 I1.4 Q1.4 AIW8 AQW8 I0.5 Q0.5 I1.5 Q1.5 AIW10 AQW10 I0.6 Q0.6 I1.6 Q1.6 AIW12 AQW12 I0.7 Q0.7 I1.7 Q1.7 AIW14 AQW14

Example of a CPU 214 and a CP 242-8 inserted directly beside the CPU

I0.0 Q0.0 I2.0 Q2.0 AIW0 AQW0 I0.1 Q0.1 I2.1 Q2.1 AIW2 AQW2 I0.2 Q0.2 I2.2 Q2.2 AIW4 AQW4 I0.3 Q0.3 I2.3 Q2.3 AIW6 AQW6 I0.4 Q0.4 I2.4 Q2.4 AIW8 AQW8 I0.5 Q0.5 I2.5 Q2.5 AIW10 AQW10 I0.6 Q0.6 I2.6 Q2.6 AIW12 AQW12 I0.7 Q0.7 I2.7 Q2.7 AIW14 AQW14 I1.0 Q1.0

I1.1 Q1.1 I1.2

I1.3 I1.4 I1.5

Example of a CPU 214, a CP 242-2 and a CP 242-8

I0.0 Q0.0 I2.0 Q2.0 AIW0 AQW0 I3.0 Q3.0 AIW16 AQW16 I0.1 Q0.1 I2.1 Q2.1 AIW2 AQW2 I3.1 Q3.1 AIW18 AQW18 I0.2 Q0.2 I2.2 Q2.2 AIW4 AQW4 I3.2 Q3.2 AIW20 AQW20 I0.3 Q0.3 I2.3 Q2.3 AIW6 AQW6 I3.3 Q3.3 AIW22 AQW22 I0.4 Q0.4 I2.4 Q2.4 AIW8 AQW8 I3.4 Q3.4 AIW24 AQW24 I0.5 Q0.5 I2.5 Q2.5 AIW10 AQW10 I3.5 Q3.5 AIW26 AQW26 I0.6 Q0.6 I2.6 Q2.6 AIW12 AQW12 I3.6 Q3.6 AIW28 AQW28 I0.7 Q0.7 I2.7 Q2.7 AIW14 AQW14 I3.7 Q3.7 AIW30 AQW30 I1.0 Q1.0

I1.1 Q1.1 I1.2

I1.3 I1.4 I1.5

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Example of a CPU 214, one 8DI module, one 3AI/1AO module and a CP 242-8

I0.0 Q0.0 I2.0 AIW0 AQW0 I3.0 Q2.0 AIW16 AQW16 I0.1 Q0.1 I2.1 AIW2 I3.1 Q2.1 AIW18 AQW18 I0.2 Q0.2 I2.2 AIW4 I3.2 Q2.2 AIW20 AQW20 I0.3 Q0.3 I2.3 I3.3 Q2.3 AIW22 AQW22 I0.4 Q0.4 I2.4 I3.4 Q2.4 AIW24 AQW24 I0.5 Q0.5 I2.5 I3.5 Q2.5 AIW26 AQW26 I0.6 Q0.6 I2.6 I3.6 Q2.6 AIW28 AQW28 I0.7 Q0.7 I2.7 I3.7 Q2.7 AIW30 AQW30 I1.0 Q1.0

I1.1 Q1.1 I1.2

I1.3 I1.4 I1.5

Example of a CPU 216, one CP 242-8

I0.0 Q0.0 I3.0 Q2.0 AIW0 AQW0 I0.1 Q0.1 I3.1 Q2.1 AIW2 AQW2 I0.2 Q0.2 I3.2 Q2.2 AIW4 AQW4 I0.3 Q0.3 I3.3 Q2.3 AIW6 AQW6 I0.4 Q0.4 I3.4 Q2.4 AIW8 AQW8 I0.5 Q0.5 I3.5 Q2.5 AIW10 AQW10 I0.6 Q0.6 I3.6 Q2.6 AIW12 AQW12 I0.7 Q0.7 I3.7 Q2.7 AIW14 AQW14 I1.0 Q1.0

I1.1 Q1.1 I1.2 Q1.2 I1.3 Q1.3 I1.4 Q1.4 I1.5 Q1.5 I1.6 Q1.6 I1.7 Q1.7 I2.0

I2.1 I2.2 I2.3 I2.4 I2.5 I2.6 I2.7

2.3 Meaning of the Data in the Digital Module

Overview

The digital module of the CP 242-8 consists of four registers:

Identification register, 8 bits (I/O module identifier)Error register, 8 bits

Input register, 8DI (status byte of the CP 242-8)Output register, 8DO (control byte of the CP 242-8)Essentially, the functions shown in the following diagram are handled via thisregister:

CP 242-8 PROFIBUS DP

SF APF

CM

AS-Interface Master

CP 242-2

6GK7 242-2AX00-0XA0 1

3

5 7 0 9

10 12 15 17 20 22 25 27 30

User program Digital module (8DI/8DO)

Analog module (8AI/8AO)

Figure 2-2

2-8 AS-Interface Master / PROFIBUS DP Slave – Release 01CP 242-8

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2.3.1 Identification Register in the Digital Module

Meaning

The identification register signals the I/O module identifier to indicate the existence

of an 8DI/8DO digital module with the value specified below

The address at which the program can access the identification register depends

on the slot in which the CP 242-8 is inserted

For further information about the special bit memory and its structure for I/Omodules refer to/5/

Range of Values

The identification register can be read via the special bit memory of the S7-200

CPU It provides the fixed value 05H.

Example

Situation: The CP 242-8 is inserted directly beside the S7-200 CPU

The content of the identification register can be read from SMB8

2.3.2 Error Register in the Digital Module

Meaning for the User Program

With this register, the CP 242-8 signals errors to the user program

Structure of the Error Register

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Bit Description/Range of Values

Table 2-1

CER 0 AS-i configuration correct (only in the protected mode)

The ”CER” LED is off

1 AS-i configuration error (only in the protected mode) This indicates a difference between the slave configuration detected on the AS-i cable and the desired configuration configured on the CP 242-8.

The ”CER” LED is lit ( see Section 1.7.1 Status Display of the

CP 242-8).

BF 0 The CP 242-8 has correct parameters and is correctly

configured Cyclic data exchange with the PROFIBUS DP master is active.

1 Can have the following meaning:

The connection between the DP master and the CP 242-8 has broken down or the DP master is not active.

The CP 242-8 was not or was incorrectly configured/assigned parameters by the DP master.

APF 0 AS-i voltage correct

The ”APF” LED is off.

1 AS-i Power Fail;

This indicates that the voltage supplied on the AS-i cable by the AS-i power supply unit is too low or there is a complete power outage.

The ”APF” LED is lit ( see Section 1.7.1 Status Display of the

CP 242-8).

2-10 AS-Interface Master / PROFIBUS DP Slave – Release 01CP 242-8

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Table 2-1 , (continued)

DIA 0 The CP 242-8 is not indicating diagnostic information.

1 The CP 242-8 is indicating diagnostic information.

Diagnostic information is signaled by the CP 242-8 when bit PLC_RUN=0 is set (see Section 2.3.4 ) This is the case when the S7-200 CPU is in the STOP mode.

Example of Access to the Error Register

Situation: The CP 242-8 is inserted directly beside the S7-200 CPU

Evaluate the special memory bits SM9.0 to SM9.4 in the SM area (for more

information about the special bit memory area of the S7-200 CPU, refer to /5/)

If an error has occurred one or more of these bits is set

2.3.3 Status Byte (Input Register 8DI)

Meaning for the User Program

This register indicates the status of the CP 242-8 in terms of the AS-i master

interface and the DP slave interface

Structure of the Status Byte

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Description of the Bits

Table 2-2

ASI_MODE 0 The CP 242-8 is in the protected mode.

1 The CP 242-8 is in the configuration mode.

CP_READY 0 The CP 242-8 is not yet operational after turning on

the power supply Evaluation of the I/O data or other information from the CP is not permitted.

1 The CP 242-8 is ready for operation

DP_STATE

1 / 0

Status of the PROFIBUS DP interface

1 / 0

0 0 After turning on the CP 242-8, no communication

between the DP master and the CP 242-8 has yet taken place (for example parameter assignment, configuration).

0 1 Parameter assignment or configuration error Check

the correct configuration of the PROFIBUS DP master.

1 0 Cyclic data exchange between the DP master and CP

242-8 is active.

1 1 Cyclic data exchange between the DP master and CP

242-8 is interrupted.

DP_CONS 0 The PROFIBUS DP master is exchanging

byte-consistent data with the CP 242-8.

1 The PROFIBUS DP master is exchanging

block-consistent data with the CP 242-8.

2-12 AS-Interface Master / PROFIBUS DP Slave – Release 01CP 242-8

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Table 2-2 , (continued)

DP_RESP 0/1 Response bit for consistent data transfer (see Section

3.5 ).

ASI_RESP 0/1 Response bit for the AS-i command interface (see

Section 3.5).